"Property" meaning, presumably, their infrastructure (e.g., the tower that holds the rocket up before it launches, etc.); and "vehicle" is the rocket itself... Don't worry, they didn't launch this and blow-up over suburbia!
I imagine that the "property" that was damaged is to the launch facility itself. The launch was on Wallops Island, VA which is largely (if not entirely) uninhabited. http://en.wikipedia.org/wiki/Wallops_Island
The rocket's payload may also be considered property. Lots of expensive equipment inside.
The town of Chincoteague is a few miles away from the pad. I'm guessing the worst impact there was some windows got rattled by the shockwave from the destruction of the 2nd stage.
I'm guessing they mean the launch tower.
And to be clear, the debris field is over the Atlantic Ocean. The launch was scheduled for last night but had to be scrubbed because a boater had entered the restricted area.
The debris field would have been over the Atlantic, had the rocket made it that far. However it failed while it was still over the launchpad, fell out of the sky, and exploded when it fell onto the launchpad.